Manufacture of artificial sausage casings



2,852,812 Patented. Sept-.123, 1958 United States Patent OfiliceMANUFACTURE. OF ARTIFICIAL. SAUSAGE CASIN GS Emil Braun, Weinheim an derBergstrasse, Germany, assignor to Carl Freudenberg,Kommanditgesellschait auf Aktien, Weinheim, Germany No Drawing.Application March 24, 1955 Serial No. 496,603

Claims priority, application GermanyApril 14, 1954 3 Claims. (.Cl.18-57) The inventionrelates to the manufacture *of'artificial sausagecasings. uch casings suitable animal skins.

For this purpose, such pieces of suitable slze are treated .withswelling agents, the

mg treatment may consist first where the 1118161181 is placed broughttoa pH of about-13;t'hematerial is then Washed inflated state through adrying channel, which is heated, hot air. The casing may then be curedby liquids or gases of the type used for the conventional curing ofsausages.

another method, artificial sausage casings whereby must be followed by adrying proconveyed through drying chambers of considerable length.

A principal object of the present invention is to provide an improvedmethod for hardening sausage casings prepared from collagenousmaterials.

of the dry content ofsaid mass.

As set forth hereinalbove, the swollen'fibrous mass is processed almostexclusively in the acid-phase (pH of about 2.5 to 4.0). is. surprisingand quite unexpected that the glyoXal exerts'itshardening' action alsoinsaid acid conditions, and that the physical and. eoll'oido-ch emicalproperties of the acid swollen fibrous mass'are-in'no Way harmfullyaffected by the therein.

kg. of tions and fat grained porhave been sorted out, are

hours at 85 C. After said heating time, a test with said glyoxal withsaid collagenous material, thereby hardfuchsine sulfurous acid forglyoXal is negative. When ening said tubing. soaked in water, the tubingabsorbs only 90 percent 3. Amethod of forming artificial sausage casingscomby weight of water. It withstands all stresses to which prisingconverting collagenous material into a plastic it is subjected when usedas a sausage casing. fibrous mass having a dry content of only about 8to I claim: 11 percent, adjusting the pH of said mass to a pH of 1. In amethod of forming artificial sausage casings about 2.5 to 4, adding tosaid mass glyoxal in aqueous by extruding a swollen plastic fibrouscollagenous mass solution in an amount of about 0.5 to 1.5 percent byhaving a dry content of only about 8 to 11 percent weight of the drycontent of said mass, which amount through annular nozzles, the steps ofincorporating into of glyoxal does not aflect the collagen of said massprior said mass, prior to extrusion, glyoxal in-aqueous solution to thesubsequent drying and heating steps forming in an amount of 0.5 to 1.5percent by weight, based on said mass into tubing, inflating said tubingwith air, drythe dry content of said mass, which amount of glyoxal ingsaid tubing, deflating said dried tubing, winding does not afiect thecolloidal properties of the mass prior said tubing to a coil, andheating said coil to a temperature to, and during, said extrusion, andsubjecting the ex- 15 of about 65 to 120 C. for a period of time ofabout truded casing to a heat treatment at a temperature of 10 minutesto 10 hours, the shorter heating times corabout 65 to 120 C. for a timesuflicient to produce the responding to the higher temperatures.hardening effect of the. glyoxal.

2. A method of forming artificial sausage casings com- References Citedin the file of this P prising converting collagenous material into aplastic UN T STA PATENTS fibrous mass having a dry content of only about8 to 11 percent, adjusting the pH of said mass to a pH of about 22323;:5 g 2.5 to 4, adding to said mass glyoxal in aqueous solu- 2478248 Cm tn g 5 g 1949 tion in an amount of about 0.5 to 1.5 percent by weight2519978 s Au 1950 of the dry content of said mass, which amount ofglyoxal 25 2524042 Cr st 'gj 'g 1950 does not afiect the collagen ofsaid mass prior to the 2570443 3 1951 subsequent drying and heatingsteps forming said mass 2576576 zgfi'ggg 1951 into tubing, inflatingsaid tubing with air, drying said tubing, removing said inflating air,and heating said dried FOREIGN PATENTS tubing to temperatures of about65 to 120 C. for a time 30 92, Germany 12,, 1953 sufficient to producesubstantially complete reaction of 471,566 Great Britain 'Sept. 7, 1937

1. IN A METHOD OF FORMING ARTIFICAL SAUSAGE CASINGS BY EXTRUDING ASWOLLEN PLASTIC FIBROUS COLLAGENOUS MASS HAVING A DRY CONTANT OF ONLYABOUT 8 TO 11 PERCENT THROUGH ANNULAR NOZZLES, THE STEPS OFINCORPORATING INTO SAID MASS, PRIOR TO EXTURSION, GLYOXAL IN AQUEOUSSOLUTION IN AN AMOUNT OF 0.5 TO 1.5 PERCENT BY WEIGHT, BASED ON THE DRYCONTENT OF SAID MASS, WHICH AMOUNT OF GLYOXAL DOES NOT EFFECT THECOLLOIDAL PROPERTIES OF THE MASS PRIOR TO, AND DURING, SAID EXTURSION,AND SUBJECTING THE EXTRUDED CASING TO A HEAT TREATMENT AT A TEMPERATUREOF ABOUT 65 TO 120*C. FOR A TIME SUFFICIENT TO PRODUCE THE HARDENINGEFFECT OF THE GLYOXAL.